Added some checks to a position so a BasicDBObject doesn't has to have all the fields.

Edited the DeltaRobotModule so it doesn't bitch about missing values it shouldn't miss.
Edited the pen module so it works a new way.
Merge branch 'development' of https://github.com/hesselmeulenbeld/HUniversal-Production-Utrecht into development

Conflicts:
	src/java/rexos/mas/hardware_agent/DeltaRobotModule.java